Last night my ammonia was 0, nitrites 0, and nitrates 5. Today I checked and the ammonia level is up to 0.5, nitrites 0, and nitrates 5. I thought the nitrates ate the ammonia so why is the ammonia going up? Do I need to doa water change or wait to see if it goes down? I just did a 50% water change Saturday and for those familiar with me I have had a hard time getting my tank cycled. This is the first time I have had nitrates.